Other Parts Discussed in Thread: , SN74LS31
Hello there,
I found TDC7200 which seems as very good candidate for precise frequency measurement rather than MCUs which are slow (nanosecond resolution). Unfortunately there are few features which I do not completely understand with TDC7200.
I need to measure frequency ranging 1-2 MHz of a square signal with averaging over the period of 50 usec.
time measurement resolution: <1ns (TDC7200 - 55 ps)
period of one measurement: 50 usec (TDC7200 mode 2 continuous)
Unfortunately TDC7200 can measure time between start and stop signal. I need to measure number of edges of input frequency signal during this period (50 usec).
Q1: Can TDC7200 be used for such measurements?
Q2: Is there any recommended connection / additional IC which would help me to measure number of edges within a given 50 usec measurement period? I may use traditional MCU but they do not run usually faster enough.
I am grateful for any answer.
Michael